1Martin Oster to Thomas Jefferson, 13 August 1811 (Jefferson Papers)
French language; letters in, from; M. Oster [index entry]
2Martin Oster to Thomas Jefferson, 22 September 1811 (Jefferson Papers)
French language; letters in, from; M. Oster [index entry]
3Martin Oster to Thomas Jefferson, 29 August 1812 (Jefferson Papers)
French language; letters in, from; M. Oster [index entry]